Pneumatic hammer



E. L. BURTON rusulumc mums Filed Nov. 16, 1923 2 sham-sun; 1

' Aug. 16, 19z7. I r 1,639,076

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'' 1,639,076 E. L. BURTON PNEUMAT IC HAMMER Filed Nov. 16, 1923 2 Shani-shut. 2

44 4 :7 40 4/] 3; "T. I I? y Patented Aug. 16, 1927.

UNITED STATES PATENT OFFICE.

EDWARD L. BURTON, OF SANDWICH, ILLINOIS.

, PNEUMATIC HAMMER. 7

My invention relates to improvements in pneumatic hammers, and has for its chief object to provide means for positively holding the rivet-set in the hammer or gun and absolutely prevent its accidental release therefrom, and thereby avoid the damage or gun with my invention applied thereto;

Fig. 2 is a longitudinal sectional view on line 2-2 of Fig. 1; I

F ig. 3 is a cross sectional view on line 3-3 of Fig. 2; i

Fig. 4 is a side view of the set holder or holding member-for the rivet-set;

Fig. 5 is a side view of the locking sleeve applied over said holder Fig. 6 is a view of the pneumatic hammer with a modified form of my invention applied thereto;

Fig. 7 is a longitudinal sectional view on line 77 of Fig. 6;

Fig. 8 is a cross sectional view on line 8-8 of Fig. 7, i i

Fig. 9 is a side view of the hinged set holder or holding member of this form of my invention.

In Figs. 1 to 5 of the drawings I havev shown the preferred form of construction embodying my invention, and applied to a known type of pneumatic hammer or gun lat which is provided as usual with a reciprocating rivet-set 15, and a driving member 16 for intermittently striking and actuating said rivet-set.

This preferred form of my invention comprises a holder consisting of a plurality of similar separable parts 17 and 17 extending longitudinally of the hammer, said parts being preferably connected together swingably and hingedly, as by means of interengaging lugs 18 and 18 on said parts and a pin 19 extending through said lugs. An annular flange 20 is provided on the inside of the holder for engaging in the peripheral groove 21. usually provided on the hammer,

. Application filed November 16, 1923. Serial No. 675,145.

said flange being made sufficiently broad and strong to insure positive holding in the groove and to prevent breakage thereof.

The lower part of said holder is tapered and made slightly thicker or re-enforced as shown to fit over the lower tapered portion,

of the hammer, and is provided with an 7 inwardlyturned flange 22 which surrounds the rivet-set and is adapted to engage beneath'the lateral extending means orannular ridge 23 on the rivet-set, sufficient space or .play being provided for the required reciprocation of the ridge 23between said flange 22 and the end of the hammer.

Locking means is provided for positively retaining the rivet-set in operative position,

said means comprisinga sleeve 24 having a lower tapered portion to embrace and close-' ly fit over the tapered part of the holder, and threads 25 are provided on the interior of said sleeve for engaging co-o erating peripheral threads 25' provided on t e holder, to fasten said sleeve thereon for positive ly retaining-the holder in osition. Additional means is preferabl a so provided for preventing said sleeve rom turning and workingltself loose from the holder during the operation of the hammer, said means preferably consisting of a slot 26 in the sleeve, one .or more notches 27 provided around the holder, and a catch or spring latch 28rprovided with a hook 29 engaging through said'slot 26 and into said notch 27, as best shown in Fig. 3, said catch or latch having a tip 30 engageable by a finger for withdrawing the same. i

The modified form ofvconstruction, illustrated in Figs. 6 to- 9, inclusive, is shown mounted on; a pneumatic hammer or gun 34 havlng a rec1procat1ngr1vet-set 35 and'driving member 36 therefor, this construction diflering slightly from the preceding form,

as shown. 7 I

I this form of my invention, as in the preceding form, the holder comprises several similar parts 37 and'37 extending longitu dinally .of the hammer, said arts being preferably swingably and hinge ly connected, as by means of lugs 38 and 38 on said parts, and a pin 39 extending therethrough. A strong, inwardly turned annular flange 40 is provided at the upper end of the'holder for engaging in the perifiheral oove 41 of the hammer, and the hol er is a so provided with an inwardly turned flan e 42 einbrae ing' the rivetaset and being adapted to en:

gage beneath the annular ridge 43 provided on the set, sufficient space being provided for reciprocation ofthe ridge between said flange a2 and the lower end of the hammer.

The locking means for positively retaining the holder on the hammer andthereby retaining the rivet-set in operative position, comprises a sleeve a l having an upper contracted portion 44 engaging around the hammer, and said sleeve contains interior threads 45 for engaging co-operating exterior threads 45 tapering upwardlyion the holder to fasten said sleevethereon and to lock said holder for retaining the rivet-set in its operative position.

ln'the first torm illustrated, the sleeve 2% is applied over the lower tapered end of the hammer and after the holder parts have been placed in positiononthe hammer and over the rivet-set, and the spring catch 2.8 is snapped in through the slot 26 and intothe notch 27 while in the latter term, the sleeve {i4 is first placed on thehammer, then the holder parts are applied over the rivetsetand in the groove on the hammer whereupon the sleeve 4:4; is threaded downward over the holder parts to lock them in position andthereby retain the rivet-set in its operative position and positivelyprevent release or withdrawal of the set.

l Vhile I have illustrated fand desc ribed the preferred form of construction'tor. carrying my invention into effect, this is capable of variation and modificagtion without departing from the spirit of the invention. I, therefore, do not wish to be limit-edlto the precise details of construction set forth but desire to avail myself of such variations andmodifications as come within thescopeof the appended cla ms. 1

Hav ng described my invent on, what I claim as new and desire to secure by Letters Patent is 1. In a pneumatic hammer including a cylinder provided w th an annular groove and a rivet-set with a laterally extending portion, a. set holder comprising members hinged together and having means engaging in said groove and means engaging beneath said lateral portion, and a lochingls'leeve embracing and'threade d on theupiaer of said holder to positively retain'j the rivet-set in said hammer.

2. In a pneumatic hammer including a cylinder provided with .an annular groove and a rivet-set with an annular ridge, a setholdcr comprising ,a pair of similar memcylinder and for retaining said irivetaset,

and a sleeve with a tapered portion closely embracing said taperedend and having a threaded portion for drawing said tapered end with increasing firmness-over said holder for locking the holder in position.

t. In a pneumatic hammer including a cylinder provided with agroove and a rivetset, a set holder comprising similar separable members tapered at the lower end, means on said holder for engaging in said groove and for engaging around said rivetset, means embracing said tapered ends and being threaded over said holder, and latch means on said embracing means engaging in said holder for" locking said embracing means on the holder. i

5. In a pneumatic hammer provided with a removable rivet-set, a set holder comprising similar hinged members tapered .at the lower end, means on said holder for-engaging the hammer and means surrounding and retaining said rivet-set, a sleeve threaded upwards over said holder and firml y clampingits tapered end, and a sprin'g latch engaging said holder through said sleeve.

6. In a pneumatic hammer including a cylinder provided with a groove and a 'i'langed rivet-set, a set holder comprising a pair of similar members hinged together longitudinally of the hammer, flange means on said holder for engaging in said groove and tor engaging beneatlrthe flange on said r vet-set, .a' sleeve threaded over said holder,

In testimony whereof I have signed my name to this specification.

nwa-an L. BUHF-Q31. 

